The Intermediate COCOMO is an extension of the Basic COCOMO model, and is used to estimate the programmer time to develop a software product. This extension considers a set of cost driver attributes that can be grouped into four major categories, each with a number of subcategories:

Each of the 15 attributes is rated on a 6-point scale that ranges from very low to extra high (in importance or value). Based on the rating, an effort multiplier is determined from the table below. The product of all effort multipliers results in an effort adjustment factor (EAF). Typical values for EAF range from 0.9 to 1.4.

The Intermediate Cocomo formula now takes the form...

:E= a i (KLOC) (b i ) .EAF

where E is the effort applied in person-months, KLOC is the estimated number of thousands of delivered lines of code for the project and EAF is the factor calculated above. The coefficient ai and the exponent bi are given in the next table.

:

The Development time D is calculated from E in the same way as with Basic COCOMO.

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